Magnetic Fields: Measuring Magnetic Field in a Point Inside a Volume

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SUMMARY

This discussion focuses on measuring the magnetic field at a specific point inside a volume influenced by multiple magnetic sources. The user expresses frustration with calculating the magnetic field of a single permanent magnet, emphasizing that understanding the field of one magnet allows for the summation of fields from multiple sources. The conversation references the concept of approximating a permanent magnet as a solenoid, utilizing parameters such as remnant field (B), length (l), section (s), and permeability (μ) to derive reluctance (R) and equivalent current (I). The challenges of analytically computing forces between permanent magnets are highlighted, noting the reliance on finite element analysis for viable solutions.

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I have a cluster of magnetic sources around a volume and I need to know the real magnetic field in a point (namely x_0) inside the volume by measurements in another point x' in the surface of the volume.
I'm getting mad
 
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hehe,

I'm getting mad about computing the magnetic field of only 1 permanent magnet.
I guess that basically, if you know the field of 1, you will know the total field (summing).
Here is a wikipedia link, in which an approximation is made, to consider 1 magnet as a solenoid. http://fr.wikipedia.org/wiki/Réluctance
Unfortunately i did not find any equivalent in English.

It says :
A permanent magnet with remnant field B, length l, section s, \mu its permability, it is equivalenent to a soleoind :
- of reluctance R = l/(\mus)
- with : N.I = (l.B)/\mu, N the equivalent number of current loops, I the equivalent current
- length l and section s.

Imagine how is it frustrating when you need to analytically compute the force between two permanent magnets (actually, there is no viable direct computations, only based on finite element decompositions).

-----------------------------------------------------
Correct me if I'm wrong.
http://ghazi.bousselmi.googlepages.c...3%A9sentation2
 
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